Method of forming brake-shoes.



H. JONES. METHOD OF FORMING BRAKE SIHOES.

APPLICATION FILED JUNE 12, 19I5- Patented Jan. 18, 1916.

Ill/VEA/TOH 541 91?! JZIVES Br I W W W ATTORNEYS HARRY JONES, OF SUFFERN, NEW YORK, ASSIGNOR T0 AMERICAN BRAKE SHOE 35 FOUNDRY COMPANY, .OF MAHWAH, NEW JERSEY, A CQRPORATIDN OF NEW' JERSEY.

METHOD OF FORMING BRAKE-SHOES.

Patented Jam 1%, 11916.

Application filed June 12, 1915. Serial No. 33,646.

To all whom it may concern: Be it known that I, HARRY J onus, a citi- Zen of the United States, and a resident of Sufiern, in the county of Rockland and State of New York, have made and invented certain new and useful Improvements in Methods of Forming Brake-Shoes, of-which the following is a specification.

This invention relates to a method Ofmaking brake shoes, and concerns in particular the casting of segmental brake shoes of that type wherein the various sections are formed of hard and soft metals, it being among the objects of the invention to provide an ecosection and preventing the intermixing of the metals forming the same, so that the exact, and desired, characteristics with regard to frictional qualities and wearing properties will be incorporated in each sec tion. The casting of the sections directly upon the sub-adjacent ones, provides an efli cient method for forming segmental shoes in which a binding member of expanded or openwork metal extends throughout, and

preferably the entire length of, the various sections.

Other objects and advantages will appear as the description proceeds, wherein it is to be understood that changes in the precise embodiment of the invention can be made within the scope of what is claimed without departing from the spirit thereof.

The preferred manner in a which the method is carried out isdisclosed in the accompanying drawings, wherein:

Figure 1 is a view in front elevation of one section of thermold employed, illustrating the shoe cavities prior to the insertion of the reinforcing back and bundle of metal therein; Fig. 2 is a view in side section of two molds, arranged side by side, the one being the counterpart of the other, and having contained within the shoe cavities the reinforcing back and binding members, and adapted to receive the-molten metal therein; Fig. 3 is a view in perspective of the battery of molds, securely clamped together, and

illustrating the manner in which a large number of shoes may be simultaneously cast.

In carrying out my novel process, a mold 5, including the cope 6 and drag 7, is pro- Vided with the shoe cavities 10, it being de sirable, from an economical standpoint, to provide each mold with two shoe cavities, the molten metal for which flows down through a central duct 9. The molds are so positioned that the shoe cavities 10 are arranged on end, as disclosed in Figs. 1 and 2, and a gate 8 is provided in the top wall of the mold, which communicates with the cen* tral duct 9, suitable inlet ports 1]. being arranged at successive heights within the mold and extend between the central duct and the shoe cavities. The number of inlet ports 11 corresponds to, and determines, the number of sections. the completed shoe is to contain, and are each arranged approximately centrally of the section to which they correspond.

Communicating with the brake shoe cavities 10 are the overflow ports 12 which extend through the sides of the mold and project slightly upwardly, as well as out-- wardly; the outermost extremities determining the height or length of each section of the completed shoe; The uppermost portion of each brake shoe cavity is not pro vided with overflow ports, as the top of the central duc't 9 acts in' this capacity. The brake shoe cavities 10 are provided with the reinforcing backs 13, and with the bundles of openwork or expanded metal 1-1, which si tbsequently form parts of the completed shoes, the sections being cast directly thereon.

A number of molds, as thus constituted, are placed on end and rigidly bound together by the clamps 15, forming a battery of molds, so that-the shoes may be cast in bulk, thereby materially reducing the cost of each shoe. The central duct 9 of each mold is of considerable diameter, so that the molten metal flows to the lowermost of the exposed inlet ports 11, and into the shoe cavities for the formation of theshoe sections. The pouring of the molten metal is continued until such time as it starts to es- Within the shoe cavities in as. to fill the same up to the next adjacent' such manner, the body" 1 of the shoe is built up.

cape from the lowermost of the overflow ports 12. This metal, which forms the lowermost section, is then allowed to cool, the metal within the overflow ports hardening, and closing them against further escapement of metal, the upward andoutward slant of the overflow ports insuring the complete closing and stoppage thereof, preventing the escapement of the metals which form the superimposed section. The metal which is to form the next section is then introduced such quantities overflow port, and in The temperature to which the ections are allowed to cool and set prior to he casting of the next adjacent superimposed sections.

may be varied, as desired, it being only necessary that the previously cast sections be suiiiciently hard to prev nt the intermingling of the metals ast e next section is poured.

The metal which forms each section is allowed to cool prior to the casting of the next adjacent and superimposed section, so that the resulting shoe is built up of a number of isolated sections, the spacing between of the shoe cavity in which the metal of the next or superposed section is cast. The

-metal of the various sections is thus allowed to flow throughout the various interstices of the openwork metal, and in addition, be-

' comes securely anchored to the reinforcing back'13. The positioning of the inlet ports 11 substantially central of the sections to which they correspond, minimizes, andpractically eliminates, the burning or fusing of the expanded metal 14:, as the molten metal quickly engulfs the same immediately in front of the inlet ports 11, and so protects thesame from direct contact with the inflowing metal. As far as the burning of the reinforcing member is concerned, the best position gor the inlet ports would be at ap-' proxima ely the lowermost level of each section, biit with the ports so arranged, there is mes es danger; of the molten metal becoming cooled as it rises in the shoe'cavity. With the inlet ports arranged as illustrated, the molten metal flows throughout the various interstices of the reinforcing member and produces a uniform and homo and without excessiveburning or fusing of the reinforcing member. By arranging the molds inbatteries, the casting of a large number of. shoes can be efliciently carried out, the corresponding sections sections of each shoe are preferably formed of hard and soft metals,

which they are formed, may be varied as desired.

What I claim is r I 1. The method of forming brake shoes in molds which are provided with the shoe cav- 'ity on end and with overflow ports at successive heights, consisting in introducing molten metal within said cavity until the same flows from the lowermost overflow port, allowing said metal to harden, result- 9'0 ing' in the closing of the lowermost overflow port, 7 introducing a second allotment of molten metal within said cavity until it flows from the next adjacent and superimposed overflow port, allowing said metal to-set and 1n this manner build up, body of the shoe.

2. The method of forming brake shoes of that type which includes a bundle of openstep by step I the work metal extending throughout their loo length, consisting in placingthe mold in a position with the shoe cavity on end, intro-' ducing within said cavity a bundle of open work metal, and pouring therein, and at sub sequent times, limited quantities of molten metal.

3. The method of forming brake shoes consisting in introducing, at successive intervals, limited quantities of molten metal with in a mold having a shoe cavity arranged on .end, the brake shoe cavity containing a reinforcing back and a binding member, each allotment of metal being allowed to set prior to the introduction of the next allotment.

4. The method ofv forming castings as hereinabove described, consisting in introducing molten metal within a mold cavity, which cavity is provided with overflow ports at successive heights, allowing said metal to harden, resulting in the closing of the lowermost overflow port, introducing a second allotment of molten metal within until it flows from the next adjacent and superimposedoverflow port, allowing said metal to setand close this lattenmentioned overflow port, and in this manner build up, step by step, the body of the'casting. I

5, The method of forming brake shoes geneous casting, 70

of all shoes 75 being cast at the same time. The diflerent although the number ofsections, their arrangement, and the characteristics or properties of the metals of 80 said cavity messes m ing at successive intervals limited quantities of molten metal, allowing each allotment of metal to set prior to the introduction of the next allotment, the anchorage of each allotl ment of metal to said so porting member causing the isolation of t e former by the shrinkage of the meteLdurin cooling. Ill

Signed at New York, in t e count of New York and State of New York, the 20 day of May, A. D. 1915.

- HARRY JONES. 

